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(No Model.)

. M. L. MIKESELL LOOK. No. 296,430. Patented Apr. 8,1884.

WITNESSES: INVENTOR:

ATTORNEYS.

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UNITED STATES PATENT FFIGEO MARTIN LUTHER MIKESELL, OF MUSGATINE, IOW A,ASSIGNOR, BY MESNE ASSIGNMENTS, TO MARY ELIZA MIKESELL, OF SAME PLACE.

LOCK.

SPECIFICATION forming part Of Letters Patent N0. 296,430, dated April 8,1884.

' Application filed December 18, 1883. (No model.)

.To aZZ whom it may concern.-

Be it known that I, :MARTIN LUTHER MIKE- sELL, of Muscatine, in thecounty of Muscatine and State of Iowa, have invented a new and 5Improved Look, of which the following is a full, clear, and exactdescription.

The object of my invention is to provide a lock adapted also for use asa latch, and having but few and simple parts, which act positively andare not liable to get out of order.

The invention consists in certain improve ments in that class oflockswhich have a gravitatin gtumbler or dog fitted to engage thelatchbolt tothrow the bolt outward for latching the door without the aid of aspring, as will be hereinafter fully described, and specifically setforth in the claims. ,7

Reference is to be had to the accompanying drawings, forming a part ofthis specifiation, in which similar letters of reference indicatecorresponding parts in both the figures.

Figure 1 is an elevation of the inner face of the lock, partly insection, and with the inner plate of the lock-case removed; and Fig. 2is a cross-sectional elevation of the lock on the irregular line aa: to,Fig. l. v

The letter A indicates the bolt, which has two pins or studs, G,projecting from its lower edge to form a recess in which may enter thetoe D, formed at the upper end of the weighted tumbler H, hung on theknob-spindle E, and secured thereto to turn with the spindle by a pin,G. The spindle E is shown supported by the front plate of the lock andbe substituted by the inner plate of the lock.

The letter M indicates a lock-bar or stop, shown in this instance fittedto turn on a bushing, K, which has its end bearings in re- 0 cesses k ofthe lock-plates, and also has a stud or pin, it, fixed in it, whichworks in a groove,

a, cut in the stop M, and acts at either side of a stud or pin, 0, onstop M and projecting into groove a, to swing the stop over, as in fulllines, to lock the dog H firmly against its seat H, formed in thelock-case.

I provide the bushing K with a central pin or bit, 2'), as a guide forthe key N of stop M, and in this example I have fitted the bushing gowith thezradial bars or web-plates c, which serve an inner bridge-piece,E, which latter may to support the center bit, Z1, and are engaged byslots of the key for turning the bushing to swing the stop M, as abovedescribed but any other approved key device may be used to swing thestop. 5 5

B is a screw-pin, preferably threaded into the lock-case, and adapted toenter a hole, a, made in the side of latch-bolt A, as a further securityagainst an inward or unlocking movement of the bolt.

In operation, when it is desired to use the look as a latch only, thestop M is swung back and over by the key N, as indicated in dottedlines, Fig. 1, which leaves the dog H free to swing upward by theknob-spindle, as in dotted 6 5 lines, to move the bolt A inward forunlatching and opening the door, and when the knob is released the boltwill be thrown outward by the downswing of dog H by its gravity alone,thereby dispensing with springs for the purp ose. When the door isclosed and latched, the bolt A may be locked securely by swinging thestop M over in front of the dog H or by the screw-pin B, or by bothmeans, if desired.

My improved lock may readily be made for either right or left handdoors, is entirely devoid of springs or delicate parts liable to bebroken, and the lock may be cheaply made, and is strong, durable,practical, and cfficient, either as a latch or look, and the adjustmentsfor either use are quickly and easily efiected.

I am aware that a sliding bolt has been provided with a depending arm,against which a pivoted stop may be turned by means of a key 8 5 fromthe outside or by a handle from the in-- side, to prevent said bolt frombeing forced forward by the shouldered hub on the knobshank; also, thata reversible sliding bolt has been provided with a yoke, within whichthe 0 shouldered hub of the knob-shank works, said bolt being connectedto a pivoted weight by an arm of said weight engaging a recess in saidyoke, and that said weight has been recessed at its bottom to allow apivoted stop to 9 5 turn therein to lock the weight in place, andthereby prevent the bolt from being operated by the knob, and I do notdesire to claim any such constructions, broadly, as of my invention.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. The combination of the slidingboltA with theweighted tumbler H, secured to the knobshank, and provided with a toe onits upper end engaging said bolt, and with a concavity at its lower end,and a swinging stop, M, mounted to rotate on a bushing, k, and lockagainst the lower end of the weighted tumbler, said bushing being.constructed to be operated by a key, and provided with a pin forengaging the said swinging stop, substantially as set forth.

2. The combination of the weighted tumbler with the devices for lockingsaid tumbler in place, said devices consisting of a stop, M, having agroove, n, terminating in a stud, 0, an d a bushing, k, on which saidstop is mounted, a pin, m, on said bushing and within the groove 02, anda key-post and webs b 0 in the center 20 of said bushing, substantiallyas set forth.

MARTIN LUTHER MIKESELL.

\Vitnesses FRED BRIDGMAN, BENJAMIN BEACH.

